<template>
  <div class="header">
    <div class="nav-topbar">
      <div class="container">
        <div class="topbar-menu">
          <a href="javascript:;">小米商城</a>
          <a href="javascript:;">MUI</a>
          <a href="javascript:;">云服务</a>
          <a href="javascript:;">协议规则</a>
        </div>
        <div class="topbar-user">
          <a href="javascript:;" v-if="username">{{username}}</a>
          <a href="javascript:;" v-if="!username" @click="login()">登录</a>
          <a href="javascript:;" v-if="username" @click="logout()">退出</a>
          <a href="javascript:;">我的订单</a>
          <a href="javascript:;" class="my-cart" @click="goToCart()">
            <span class="icon-cart"></span>
            购物车({{cartCount}})
          </a>
        </div>
      </div>
    </div>
    <div class="nav-header">
      <div class="container">
        <div class="header-logo">
          <a href="/#/index"></a>
        </div>
        <div class="header-menu">
          <div class="item-menu">
            <span>小米手机</span>
            <div class="children">
              <ul>
                <li class="product" v-for="(item,index) of phoneList" :key="index">
                  <a :href="'/#/product/'+item.id" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="item.mainImage" :alt="item.subtitle">
                    </div>
                    <div class="pro-name">{{item.name}}</div>
                    <div class="pro-price">{{item.price|currency}}</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>
          <div class="item-menu">
            <span>RedMi红米</span>
            
          </div>
          <div class="item-menu">
            <span>电视</span>
            <div class="children">
              <ul>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-1.jpg'">
                    </div>
                    <div class="pro-name">小米壁画电视 65英寸</div>
                    <div class="pro-price">6999元</div>
                  </a>
                </li>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-2.jpg'">
                    </div>
                    <div class="pro-name">小米全屏电视E55A</div>
                    <div class="pro-price">1999元</div>
                  </a>
                </li>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-3.png'">
                    </div>
                    <div class="pro-name">小米电视4A 32英寸</div>
                    <div class="pro-price">699元</div>
                  </a>
                </li>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-4.jpg'">
                    </div>
                    <div class="pro-name">小米电视4A 55英寸</div>
                    <div class="pro-price">1799元</div>
                  </a>
                </li>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-5.jpg'">
                    </div>
                    <div class="pro-name">小米电视4A 65英寸</div>
                    <div class="pro-price">2699元</div>
                  </a>
                </li>
                <li class="product">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="'/img/nav-img/nav-3-6.png'">
                    </div>
                    <div class="pro-name">查看全部</div>
                    <div class="pro-price">小米电视</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>
        </div>
        <div class="header-search">
          <div class="wrapper">
            <input type="text" name="keyword">
            <a href="javascript:;"></a>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
    name:'nav-header',
    data(){
      return{
        // username:this.$store.state.username,
        phoneList:[]
      }
    },
    computed:{
      username(){
        return this.$store.state.username;
      },
      cartCount(){
        return this.$store.state.cartCount;
      }
    },
    filters:{//过滤器
      currency(val){
        if(!val){
          return '0.00';
        }
        return '￥'+val.toFixed(2)+'元';
      }
    },
    methods:{
      getProductList(){
        this.axios.get('/products',{
          params:{
            categoryId:'100012',
            pageSize:6//这里指定了6条数据，所以下面不需要再判断了
          }
        }).then((res)=>{
          // if(res.list.length>6){
          //   this.phoneList=res.list.slice(0,6)
          // }
          this.phoneList=res.list;
        })
      },
      login(){//登录
        this.$router.push('/login')
      },
      logout(){//退出
         this.axios.post('/user/logout').then(()=>{
            this.$message.success('退出成功');
            this.$cookie.set('userId','',{expires:'-1'});
            this.$store.dispatch('saveUserName','');
            this.$store.dispatch('saveCartCount','0');
        })
      },
      getCartCount(){
        this.axios.get('/carts/products/sum').then((res=0)=>{
        this.$store.dispatch('saveCartCount',res)
        })
      },
      goToCart(){//跳转到购物车
        this.$router.push('/cart')
      }
    },
    mounted(){
      let params=this.$route.params;
      if(params&&params.from=='login'){//有时候会和app.vue相撞加载两次，所以做一个条件判断
         this.getProductList();
      }
     
      this.getCartCount();
    },
}
</script>

<style lang="scss" scoped>
@import '@/assets/scss/base.scss';
@import '@/assets/scss/mixin.scss';
@import '@/assets/scss/config.scss';
.header{
  .nav-topbar{
    height: 39px;
    line-height: 39px;
    background-color: #333333;
    color: #B0B0B0;
    .container{
      @include flex();
      a{
        display: inline-block;
        color:#B0B0B0;
        margin-right:17px;
      }
      .my-cart{
        width:110px;
        background-color: #ff6600;
        text-align: center;
        color:#fff;
        margin-right:0;
        .icon-cart{
          @include bgImg(16px,12px,'/img/icon-cart-checked.png');
          margin-right:4px;
        }
      }
    }
  }
  .nav-header{
    .container{
      position: relative;
      height:112px;
      @include flex();

      .header-menu{
        display: inline-block;
        padding-left: 209px;
        width:643px;
        .item-menu{
          display: inline-block;
          color:#333;
          font-weight: bold;
          font-size:16px;
          line-height: 112px;
          margin-right: 20px;
          span{
            cursor: pointer;
          }
          &:hover{
            color:$colorA;
            .children{
              height:220px;
              opacity:1;
            }
          }
          .children{
            position: absolute;
            top:112px;
            left:0;
            width:1226px;
            height: 0;
            opacity:0;
            border-top:1px #e5e5e5 solid;
            box-shadow: 0px 7px 6px 0px rgba(0,0,0,0.11);
            z-index: 10;
            transition: height .5s;
            overflow: hidden;
            background: #fff;
            .product{
              float:left;
              width:16.6%;
              height: 220px;
              font-size: 12px;
              line-height: 12px;
              text-align: center;
              position: relative;
              a{
                display:inline-block;
              }
              img{
                height:111px;
                width:auto;
                margin-top:26px;
              }
              .pro-img{
                height: 137px;
              }
              .pro-name{
                font-weight:bold;
                margin-top:19px;
                margin-bottom: 8px;
                color:$colorB;
              }
              .pro-price{
                color:$colorA;
              }
              &:before{
                content:'';
                position:absolute;
                top:28px;
                right: 0;
                border-left: 1px solid $colorF;
                height:100px;
                width:1px;
              }
              &:last-child:before{
                display:none;
              }
            }
          }
        }
      }
      .header-search{
        width:319px;
        .wrapper{
          height:50px;
          border:1px solid #e0e0e0;
          display: flex;
          align-items: center;
          input{
            border:none;
            border-right:1px solid #e0e0e0;
            width:264px;
            height:50px;
            box-sizing: border-box;
            padding-left: 14px;
          }
          a{
            @include bgImg(18px,18px,'/img/icon-search.png');
            margin-left:17px;
          }
        }
      }
    }
  }
}
</style>